Kubota LA1335 loader......weak?

[bswiv]

Using it yesterday when I noticed that it all of a sudden quit going all the way up? It'd go about 1/3 of the way and then act as if it had hit a stop?

Same thing going down, pushed to the ground and then only a couple of more inches?

And obvious things to look at?

Plenty of fluid, no leaks, seems to be strong within the range it will move. Actually filled a bucket with dirt on the way back and noticed no problems. Bucket was FULL.....carried it a full mile with no slippage of the hydraulics.

Really confused.

This is on a M8540.......

 

[KevT]

Check that your 3pt is halfway up.

 

[bswiv]

Check that your 3pt is halfway up.

??

The 3 point seems to be working fine? Explain more to me?

 

[k0ua]

Try this: It doesn't cost anything, and doesn't take much time. Shut off the tractor and uncouple and re-couple all of your Quick disconnects on your loader, making sure all are seated firmly. Fire it up and see if the loader seems to work correctly now.

 

[bswiv]

Try this: It doesn't cost anything, and doesn't take much time. Shut off the tractor and uncouple and re-couple all of your Quick disconnects on your loader, making sure all are seated firmly. Fire it up and see if the loader seems to work correctly now.

Will go give that a try in just a few minutes.......

 

[bswiv]

And this too:

The same fluid reservoir serves as transmission fluid and as gear oil with the only difference being that there is a separate pump for the front end and for the back end and for the flow to the transmission?

 

[KevT]

??

The 3 point seems to be working fine? Explain more to me?

A couple of days after I got my L3901 I went to use my loader and had the same issue, then I noticed that my 3pt was all the way up, when I lowered it a little the loader worked perfect. I dunno?

 

[KevT]

Oh and BTW, Welcome to the site :welcome: I always enjoy seeing fellow Floridians here. Especially ones close to me? :thumbsup:

 

[bswiv]

Oh and BTW, Welcome to the site :welcome: I always enjoy seeing fellow Floridians here. Especially ones close to me? :thumbsup:

Tried it.....no change.

Hope the yellow flies are no as MISERABLE down your way as they are here. Had to do the "Tanglefoot" thing to the tractor last week to make it tolerable.

 

[KevT]

I'm sorry, sounds like a pressure issue. o Yellow one but we got the Deer kind here

 

[Tx Jim]

??

The 3 point seems to be working fine? Explain more to me?

In certain conditions if 3 pt feedback rod is adjusted incorrectly it can cause 3 pt to try to raise too high causing 3 pt relief valve to unseat therefore lowering hyd system pressure lowering scv or loader hyd power. I'd suggest to plug a 5000# gauge in rear remote then activate control lever to check pressure. IIRC pressure should be 2770 psi.

 

[bswiv]

In certain conditions if 3 pt feedback rod is adjusted incorrectly it can cause 3 pt to try to raise too high causing 3 pt relief valve to unseat therefore lowering hyd system pressure lowering scv or loader hyd power. I'd suggest to plug a 5000# gauge in rear remote then activate control lever to check pressure. IIRC pressure should be 2770 psi.

Are either of these things, the rod adjustment ( assuming I could find it ) and reseating the valve, are they user serviceable?

 

[Tx Jim]

Are either of these things, the rod adjustment ( assuming I could find it ) and reseating the valve, are they user serviceable?

Yes but I suggest to acquire a gauge & test pressure.

 

[J_J]

First, install a hyd gauge in a tee in the loader IN port.

With all valves in neutral, you should see no or very little pressure.

To test relief pressure, retract the loader lift cyl and try and retract some more.

The pressure should reflect the cyl and pumps ability to develop pressure.

Now , fully raise the 3pt and hold it to the top.

The hyd gauge will now show the 3pt developed pressure.

It should be the same pressure as the loader.

 

[Tx Jim]

Technically it does not matter which direction(retract or extend) cylinder is operated as long as it moved to it's limit then system pressure will be displayed on the gauge if it's teed into the IN port.

 

[J_J]

Of course, but why raise the loader when it is usually already down/retracted.

 

[bswiv]

Thank you for the help............

Turns out that a part of a limb had wedged itself in the underside of one of the couplers and broken off a small splinter.......that was invisible. Effect was to just barely wedge the coupling out of perfect alignment and seat.

Got it cleaned up and did as you guys suggested and had the actual pressure checked......and it all works!!

Great resource here!!

 

[k0ua]

Thank you for the help............

Turns out that a part of a limb had wedged itself in the underside of one of the couplers and broken off a small splinter.......that was invisible. Effect was to just barely wedge the coupling out of perfect alignment and seat.

Got it cleaned up and did as you guys suggested and had the actual pressure checked......and it all works!!

Great resource here!!

Glad to hear it. Thanks for reporting back. Most of these sudden loader failures seem to be quick coupler issues.

 

[KevT]

Thank you for the help............

Turns out that a part of a limb had wedged itself in the underside of one of the couplers and broken off a small splinter.......that was invisible. Effect was to just barely wedge the coupling out of perfect alignment and seat.

Got it cleaned up and did as you guys suggested and had the actual pressure checked......and it all works!!

Great resource here!!

Glad it worked out for you.